When you use planning software, you can experiment and look at different variations of the project you're considering. You can test things out and see how well they would work, for example, if you use a kitchen floor planning tool, you can try out a variety of different designs or layouts.
This kind of experimentation won't require any sort of extra effort on your part. All you have to do is use the software to try things out. Once you've seen enough, you can start over from the beginning. The right software will allow you to try different things without any significant consequences.